A sharp spike of pleasure raced up his spine at the sharp little thrust and Ianto let his forehead rest against Jack's neck with it. He agreed rather mindlessly to whatever it was Jack was saying, just so long as he kept doing that. "Alright," he said eventually, voice thick and gravelly, "shagging and passing out."
When he found himself on his back, Ianto wormed a hand between them, gripping the both of them loosely in a fist to keep their alignment. Both legs went around Jack's waist and he made a mental note to try and find something lube like. Oil maybe. There had to be something.
Only they would be concerned with lube in captivity.
"Jack?" he murmured, mouthing at whatever skin he could, just for the taste of Jack. "Shut up and get on with it."